Gamma -butyrolactone is an important organic synthetic raw material and a fine solvent. It is mainly used as synthetic pyrrolidone series products cyclopropylamine acetyl-r-butyrolactone, Besides these, Gamma-butyrolactone is also used as solvent for agricultural chemicals, polymer, dyestuff and printing. UsingGamma-butyrolactone as raw material, we can produced aromatic chemicals, medicinal intermediates and rust remover.